-er bbb bbe bbg bbn bbo bbr bbs bbt be- beb bee beg ben beo ber bes bet bgb bge bgg bgn bgo bgr bgs bgt bnb bne bng bnn bno bnr bns bnt bob boe bog bon boo bor bos bot brb bre brg brn bro brr brs brt bsb bse bsg bsn bso bsr bss bst btb bte btg btn bto btr bts btt ebb ebe ebg ebn ebo ebr ebs ebt eeb eee eeg een eeo eer ees eet egb ege egg egn ego egr egs egt en- enb ene eng enn eno enr ens ent eo- eob eoe eog eon eoo eor eos eot erb ere erg ern ero err ers ert es- esb ese esg esn eso esr ess est etb ete etg etn eto etr ets ett gbe gbg gbn gbo gbr gbs gbt ge- geb gee geg gen geo ger ges get ggb ggg ggn ggo ggr ggs ggt gnb gne gnn gno gnr gns gnt gob goe gog gon goo gor gos got grb gre grg grn gro grr grs grt gsb gse gsg gsn gso gsr gss gst gtb gte gtg gtn gto gtr gts gtt nbb nbe nbg nbn nbo nbr nbs nbt ne- neb nee neg nen neo ner nes net ngb nge ngg ngn ngo ngs ngt nnb nne nng nnn nno nns nnt no- nob noe nog non noo nor nos not nrb nre nrg nrn nro nrr nrs nrt nsb nse nsg nsn nso nsr nss nst ntb nte ntg ntn nto ntr nts ntt ob- obb obe obg obn obo obr obs obt oeb oee oeg oen oeo oer oes oet oge ogg ogn ogo ogs ogt on- onb one ong onn ono onr ons ont oo- oob oog oon ooo oor oos oot or- orb ore org orn oro orr ors ort os- osb ose osg osn oso osr oss ost ot- otb ote otg otn oto otr ots ott rbb rbe rbg rbn rbo rbr rbs rbt re- reb ree reg ren reo rer res ret rgb rge rgg rgn rgo rgr rgs rgt rnb rng rnn rno rnr rns rnt rob roe rog ron roo ror ros rot rrb rrg rrn rrr rrs rrt rsb rse rsg rsn rso rsr rss rst rtb rte rtg rtn rto rtr rts rtt sbb sbe sbg sbn sbo sbr sbs sbt se- seb see seg sen seo ser ses set sgb sge sgg sgn sgo sgr sgs sgt snb sne sng snn sno snr sns snt sob soe sog son soo sor sos sot sr- srb sre srg srn sro srr srs srt ss- ssb sse ssg ssn sso ssr sss sst stb ste stg stn sto str sts stt tbb tbe tbg tbn tbo tbr tbs tbt te- teb tee teg ten teo ter tes tet tgb tge tgg tgn tgo tgr tgs tgt tnb tne tng tnn tno tnr tns tnt to- tob toe tog ton too tor tos tot trb tre trg trn tro trr trs trt tsb tse tsg tsn tso tsr tss tst ttb tte ttg ttn tto ttr tts ttt